{
  "manageEntity": {
    "action": "Save",
    "entityId": "1562947527",
    "entityType": "Track",
    "nonce": "0x1fd3534c0594905837e0ba46bd22296bf11e2faa6682f3c50f4c942616e28690",
    "signature": "0xc6357b1adca099df23fb4739b6c706077b0a6d3dfe87b5a1f05431f4380f39897308f2b6a325ebba1e59b12c7e65bf8f654c61f8e13b3b340538c18416f80d0f1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}